Identify the correct statements:
$I.$ The outer layer of the kidney is called a capsule.
$II.$ The kidney is divided into an outer cortex and an inner medulla.
$III.$ The medulla is divided into medullary pyramids.
$IV.$ The cortex extends in between the medullary pyramids,which is called the columns of Bertini.
Choose the correct option accordingly.

• A
  $I, III$ and $IV$
• B
  $I$ and $IV$
• C
  $I, II$ and $III$
• D
  $I, II, III$ and $IV$